is no. these tragedies must end. and to end them, we must change. >> reporter: president obama, stricken and stern, promised to make america safer for our children. >> i'll use whatever power this office holds to engage my fellow citizens in an effort aimed at preventing more tragedies like this. are we really prepared to say we're powerless in the face of such carnage? >> reporter: across the audience, tears became sobs, as the president remembered those who shielded the children. >> dawn hochsprung, mary sherlach, lauren rousseau, vicki soto, rachel davino and anne marie murphy. >> reporter: and finally, one by one, each of the 20 little ones. lives cut short in the first grade. >> charlotte. daniel. olivia. josephine. ana. dylan, madeleine, catherine. chase. jesse. james. grace. emilie. jack. noah. caroline. jessica. benjamin. avielle. allison. >> reporter: a president's tribute, offering comfort to the families, encouragement to newtown, and a challenge for all of us. and the first two of those young victims will be laid to rest today. noah pozner and jack pinto. amy, you've spent th
